I always cut mine down to the ground in the autumn, i grew them from seed about 3 years ago and the get better every year, growing to about 5 feet tall, last autumn i dug some up and put in pots in the cold frame to move them somewhere new this year, don't know whether they'll be ok but they've survived the winter so far so fingers crossed!

can anyone help me please, i am a new to gardening and i have several Echinecias growing throughout my garden, just want to know, do you dead head them once the the flower is fading like you do with pansies, does it encourage more blooms throughout the summer?